code: def test_empty_timetable() -> None:
      empty_timetable = EventsTimetable(event_dates=[])
      next_info = empty_timetable.next_dagrun_info(
          last_automated_data_interval=None,
          restriction=TimeRestriction(
              earliest=START_DATE, latest=None, catchup=False
          ),
      )
      assert next_info is None
  
file_path: airflow/tests/timetables/test_events_timetable.py
imports: from __future__ import annotations
  import pendulum
  import pytest
  import time_machine
  from airflow.timetables.base import DagRunInfo, DataInterval, TimeRestriction, Timetable
  from airflow.timetables.events import EventsTimetable
  from airflow.utils.timezone import utc
label_desc: Use image node_id 10 for calling a global function with example usage: test_empty_timetable() without return types